Diary作文250字

　　Today is a sunny day.I am writing a diary now.

　　This diary is about a thing happened in yesterday.

　　Just in yesterday,about 9:00 P.M.

　　I was chatting with my friend,ZMY.She is a girl and I am a boy.

　　In fact,she just call me for help.She offer some problems to me,and hope to know how to deal with it.

　　Then I came to have a look.They are some problems about chemical.Right,her chemical is not good.

　　The first question:"How to make CO2?"

　　It's a easy question,we can use HCl and CaCO3 to make it on.

　　Some times later,it's about 10:00 P.M.we went to bed and said "Good night" each other.

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